122767921 has 4 divisors (see below), whose sum is σ = 122800500. Its totient is φ = 122735344.

The previous prime is 122767913. The next prime is 122767927. The reversal of 122767921 is 129767221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2624400 + 120143521 = 1620^2 + 10961^2 .

It is a cyclic number.

It is not a de Polignac number, because 122767921 - 2³ = 122767913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122767927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9766 + ... + 18463.

It is an arithmetic number, because the mean of its divisors is an integer number (30700125).

Almost surely, 2^122767921 is an apocalyptic number.

It is an amenable number.

122767921 is a deficient number, since it is larger than the sum of its proper divisors (32579).

122767921 is an equidigital number, since it uses as much as digits as its factorization.

122767921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32578.

The product of its digits is 21168, while the sum is 37.

The square root of 122767921 is about 11080.0686369715. The cubic root of 122767921 is about 497.0060024078.

The spelling of 122767921 in words is "one hundred twenty-two million, seven hundred sixty-seven thousand, nine hundred twenty-one".